Natsuhiko OTSUKA, Xiaoyang LI and Koh IZUMIYAMA(2018). Characteristics of sea ice condition along the Northern Sea Route, Proc., 33rd Intl. Symp. on Okhotsk Sea and Polar Oceans, pp.-**
Natsuhiko OTSUKA, Xiaoyang LI and Koh IZUMIYAMA(2018). Characteristics of sea ice condition along the Northern Sea Route, Proc., 33rd Intl. Symp. on Okhotsk Sea and Polar Oceans, pp.-**